From adab70240390b100fbd64e95d7522bb02079a9a8 Mon Sep 17 00:00:00 2001
From: epriestley <git@epriestley.com>
Date: Sun, 17 Feb 2019 17:39:34 -0800
Subject: [PATCH] Fix a PhutilURI issue in Multimeter

Fished this out of the `secure` error logs.
---
 .../multimeter/controller/MultimeterSampleController.php     | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/applications/multimeter/controller/MultimeterSampleController.php b/src/applications/multimeter/controller/MultimeterSampleController.php
index 73c9ba530e..190a839f63 100644
--- a/src/applications/multimeter/controller/MultimeterSampleController.php
+++ b/src/applications/multimeter/controller/MultimeterSampleController.php
@@ -300,9 +300,10 @@ final class MultimeterSampleController extends MultimeterController {
 
     $group = implode('.', $group);
     if (!strlen($group)) {
-      $group = null;
+      $uri->removeQueryParam('group');
+    } else {
+      $uri->replaceQueryParam('group', $group);
     }
-    $uri->replaceQueryParam('group', $group);
 
     if ($wipe) {
       foreach ($this->getColumnMap() as $key => $column) {